--- title: "delo — Niche Verdict: Skip it (52/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/automotive/delo" last_updated: "2026-07-09T21:45:36.703Z" locale: en meta: description: "strong incumbent ratings (4.8★) — delo doesn't clear our bar today." "og:description": "strong incumbent ratings (4.8★) — delo doesn't clear our bar today." "og:title": "delo — Niche Verdict: Skip it (52/100) | Amazon United States - Flapen" --- Back to Flapen home # **delo** **Skip it****52/100 ** strong incumbent ratings (4.8★) — delo doesn't clear our bar today. **Market/yr** **$1.1M** **Growth (1y)** **+178.9%** **Products** **18** **Brands** **5** was 6 a year ago **Sellers** **120** **Price range** **$14.89–$86.26** **Returns** **0.5%** **Rating** **4.8★** **Skip it** Scored 52/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **35** ×0.30 Growth **74** ×0.30 Competition **40** ×0.20 Quality gap **20** ×0.10 Returns **96** ×0.10 ## **Demand** Weekly Amazon search volume, last 104 weeks — +178.9% year over year. 21K10KPrime Day '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26 ## **Seasonality** Monthly demand index across the year — 1.00 is average. JFMAMJJASOND No pronounced peak months · busiest ÷ quietest = 1.6× ## **Competition** - Shell Rotella85% - Valvoline10% - Schaeffer Manufacturing Co2% - Mobil2% - Royal Purple1% - Other0% The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them. 5 brands and 120 sellers compete here. **Brands** **5 **▼falling was 6 a year ago **Sellers** **120** **Top 5 brand share** **100%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)](https://m.media-amazon.com/images/I/51S6Qm9kZfL.jpg) [**Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)**](https://www.amazon.com/dp/B07PSVLF6G) Shell Rotella$68.214.7★3,25119%▼falling 2 ![Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/41WrazgRjOL.jpg) [**Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 1 Gallon**](https://www.amazon.com/dp/B01LH7L0XA) Shell Rotella$15.734.7★1,62318%▲rising 3 ![Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 2.5 Gallon](https://m.media-amazon.com/images/I/41j52EcCGRL.jpg) [**Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 2.5 Gallon**](https://www.amazon.com/dp/B01LH7KPUY) Shell Rotella$37.174.7★96310%▲rising 4 ![Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/41JKOlcQ9dL.jpg) [**Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon**](https://www.amazon.com/dp/B08DSN92RP) Shell Rotella$24.494.7★3,2519%▲rising 5 ![Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/41RWuRUnTUL.jpg) [**Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 1 Gallon**](https://www.amazon.com/dp/B01LH7L0KS) Shell Rotella$23.544.8★12,0077%▲rising 6 ![Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/41X-NocmDSL.jpg) [**Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon**](https://www.amazon.com/dp/B01LG3Q5RG) Shell Rotella$20.034.8★4,4156%▲rising 7 ![Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)](https://m.media-amazon.com/images/I/419M8vKSqRL.jpg) [**Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)**](https://www.amazon.com/dp/B01LH7LAOO) Shell Rotella$57.414.8★4,4156%▼falling 8 ![Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/4120h-C2upL.jpg) [**Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon**](https://www.amazon.com/dp/B0FBQRGY8K) Valvoline$22.004.8★1725%▲rising 9 ![Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 2.5 Gallon (2 Pack)](https://m.media-amazon.com/images/I/41ElqJk6wZL.jpg) [**Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 2.5 Gallon (2 Pack)**](https://www.amazon.com/dp/B01LH7KULS) Shell Rotella$78.234.8★2,7934%▼falling 10 ![Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)](https://m.media-amazon.com/images/I/41X93TRDu2L.jpg) [**Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)**](https://www.amazon.com/dp/B01LH7L0D0) Shell Rotella$44.674.8★2,7932%▼falling 11 ![Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 1 Gallon (3 Pack)](https://m.media-amazon.com/images/I/419gpLH7TyL.jpg) [**Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 1 Gallon (3 Pack)**](https://www.amazon.com/dp/B01LG3Q6LQ) Shell Rotella$67.964.8★12,0072%▼falling 12 ![Valvoline Heavy Duty Synthetic Blend 15W-40 Diesel Engine Oil 2.5 Gallon](https://m.media-amazon.com/images/I/41wAPPYQwZL.jpg) [**Valvoline Heavy Duty Synthetic Blend 15W-40 Diesel Engine Oil 2.5 Gallon**](https://www.amazon.com/dp/B0FBR1GV4T) Valvoline$36.894.8★1492%▲rising 13 ![Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil 1-Gallon Bottle](https://m.media-amazon.com/images/I/512V4EWEocL.jpg) [**Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil 1-Gallon Bottle**](https://www.amazon.com/dp/B06VVXGSM7) Schaeffer Manufacturing Co$46.894.8★4102%▼falling 14 ![Valvoline Premium Blue One Solution SAE 15W-40 Diesel Engine Oil 1 GA](https://m.media-amazon.com/images/I/41IGNhYNCyL.jpg) [**Valvoline Premium Blue One Solution SAE 15W-40 Diesel Engine Oil 1 GA**](https://www.amazon.com/dp/B000GAP43W) Valvoline$23.284.8★1,4652%▼falling 15 ![Mobil 1 112786 Delvac 1300 Super 15W-40 Diesel Engine Oil - 4 Gallon Pack](https://m.media-amazon.com/images/I/51EPfqpjXzL.jpg) [**Mobil 1 112786 Delvac 1300 Super 15W-40 Diesel Engine Oil - 4 Gallon Pack**](https://www.amazon.com/dp/B00WDZA0GO) Mobil$80.874.5★2742%—flat **~~Showing 15 of 18 — show all ~~** ## **Product shelf** All 18 tracked products in this niche. Top sellersNewestTrending [![Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)](https://m.media-amazon.com/images/I/51S6Qm9kZfL.jpg)**Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)** Shell Rotella**$68.21**4.7★3,251 reviews](https://www.amazon.com/dp/B07PSVLF6G) [![Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/41WrazgRjOL.jpg)**Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 1 Gallon** Shell Rotella**$15.73**4.7★1,623 reviews](https://www.amazon.com/dp/B01LH7L0XA) [![Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 2.5 Gallon](https://m.media-amazon.com/images/I/41j52EcCGRL.jpg)**Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 2.5 Gallon** Shell Rotella**$37.17**4.7★963 reviews](https://www.amazon.com/dp/B01LH7KPUY) [![Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/41JKOlcQ9dL.jpg)**Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon** Shell Rotella**$24.49**4.7★3,251 reviews](https://www.amazon.com/dp/B08DSN92RP) [![Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/41RWuRUnTUL.jpg)**Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 1 Gallon** Shell Rotella**$23.54**4.8★12,007 reviews](https://www.amazon.com/dp/B01LH7L0KS) [![Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/41X-NocmDSL.jpg)**Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon** Shell Rotella**$20.03**4.8★4,415 reviews](https://www.amazon.com/dp/B01LG3Q5RG) [![Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)](https://m.media-amazon.com/images/I/419M8vKSqRL.jpg)**Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)** Shell Rotella**$57.41**4.8★4,415 reviews](https://www.amazon.com/dp/B01LH7LAOO) [![Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon](https://m.media-amazon.com/images/I/4120h-C2upL.jpg)**Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon** Valvoline**$22.00**4.8★172 reviews](https://www.amazon.com/dp/B0FBQRGY8K) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Value For Money**39% *“worth it”* **Lubrication**24% *“Good lubricant”* **Quality-Overall**17% *“Great quality”* **Advertised Vs Actual Product**5% *“Works as it should”* **Fuel Efficiency**4% *“seen no issues like I have with running other oils in my diesel”* **Motor Power**2% *“Good for all engines, including propane & NG”* **Ease Of Use**1% *“Convenient container for oil change”* **Coolant**1% *“this oil for my diesel truck keeps my engine cooler”* **Efficiency**1% *“The bike runs well with this oil”* **Size-Overall**0% *“Perfect size for 93 f250 7.3 oil change”* ### **What buyers complain about ** **Leak-Proof**45% *“leaking really bad”* **Value For Money**10% *“Was a lot cheaper then tacking to the dealer”* **Lubrication**6% *“Slippery and oily”* **Quality-Overall**5% *“Cheaper than Walmart and better quality”* **Product Condition**4% *“JUST RETIRED”* **Strength**3% *“Duramax LML STRONG”* **Filtration**3% *“Poor fuel filters”* **Flammable**3% *“they can blow up your engine”* **Advertised Vs Actual Product**2% *“It was not stated in ad”* **Ease Of Cleaning**2% *“make a mess”* #### **Top return reasons**- Leak-Proof53% - Lubrication16% - Compatibility-Overall8% - Value For Money6% - Advertised Vs Actual Product4% - Defective Material/Parts3% - Fuel Efficiency1% - Size-Overall1% - Material Quality1% - Wet Cleaning1%